\begin{tikzpicture}[>=Stealth]
    \draw [->] (-5.3,0) -- (6.5,0);
    \foreach \x in {-5,...,6} {
        \draw (\x,0.3) -- (\x,0);
    }

    \foreach \pos/\text in {-4/-4, 0/0, 3/+3} {
        \node at (\pos, 0) [below] {$\text$};
    }

    \draw (-4, 0.4) -- (-4, 1)
          (0, 0.4) -- (0, 1)
          (3, 0.4) -- (3, 0.8);
    \draw [->] (0, 0.8) -- (-4, 0.8);
    \draw [->] (0, 0.6) -- (3, 0.6);
\end{tikzpicture}
